Liquid fuel burning apparatus



Dec. 29, 1931. LIMOTLEY LIQUID FUEL BURNING APPARATUS Filed Jan. 28, 1930 3 Sheets-Sheet 2 Dec. 29, 1931. I L, M TLEY r 1,838,321

LIQUID FUEL BURNI NG APPARATUS Filed Jan. 28, 1950 3 Sheets-Sheet 5 Patented Dec. 29, 1931 UNITED STATES Parent oFFicE;

LEWIS Money, or STAINES, ENGL ND niacin F L nuanme APPARATUS Application filed. January 28, 1930, Serial No. 424,018, and in Great fritaiii May 17, 1929. T

This invention relates to liquid fuel burning apparatus and has for its object to provide apparatus of simplifiedconstruction and more eificient than used heretofore.

According to the present invention the liquid fuel is supplied to the burner under pressure, the pressure being obtained either by pneumatic or hydraulic means. a

The liquid fuel burners are of simplified construction being constructed without brazed or welded joints and so as to facilitate cleaning.

These burners are cast in one piece, the passages being free from bends thereby ensuring accelerated vapourization of the fuel within the burner prior to ignition and also rendering the insides of the tubes being readily accessible. The burner is of the kind vapourizing tubes above the nozzle and in one form of the burnerthese tubes are arranged tangentially to a central jet flame opening in the top of the burner.

In the appended drawings Figure 1 is a cross-sectional side elevation of the burner, Figure 2 is a plan of Figure 1, Figure 3 isa plan similar to Figure but showing a modified construction of the vapourizing tubes, Figure 4' is a sectional side elevation of a flame ring for use with a burner asshown in Figure 1, Figure 5 is a plan of Figure 4, Figure 6 is a modified flame ring, in sectional side elevation and Figure 7 is a plan of Fig ure 6.

In Figure 2 of the drawings, is shown a liquid fuel vapourizing burner which is cast in one piece from any suitable material which will adequately withstand the heat generated in the burning of the liquid fuel. To the interior of the burner at the top, lead liquid fuel pipes 1, which are of straight formation and free from bends or curves. Vapourizing cross tubes or passages 2 are at the top of the burner, which are provided with a plurality of threaded. and taper seated openings 3 which permit of ready access tow the inside of the tube for cleaning and decarbonizing and which. are closed by easily renewable plugs of special form ensuring a fluid tight joint. Extending downwardly from the tubes 2 towards a common centre aregas tubes or passo as to provide for a direct central flame jet r1100 sages 4, the tubes 4 being free from bends. At the juncture of the tubes 4 is an orifice 5 which receives a fuel jet j ofspecial form, the gasified or vapourized oilfrom which is discharged into the ring shaped chamber 6 in the interior of the burner, cast integral with the tubes 4:. I

' The plugsP for the vap ourizer tubes 2 which are inserted in the openings 3 are of a design having a very fine thread and a narrow angle metal to metal taper seating, and are made of a softer material and of a lower melting point than the burner. to act as a ,safety' device against over heating or. against strippingwhich might result from careless assembly of thelparts in question; I i

Surrounding the threaded and taper seat.- ed apertures 3 in the burner are small circular fins 3a which prevent the burners from expanding unduly with resultant loosening of the plugs. The fuel jet 9' is constructed with a thread and seating in a manner similar to the plugs P described above, and is inserted through the opening 5a and ,is tightened with a box key. 7 The bore of the jet is tapered at a very fine angle to a fine outlet jet for ensuring progressive acceleration of the gas with resultant scouring action of the gas before it reaches the jet proper thus preventing the building up .of carbon deposit on the walls of the jet due to the cracking of the fuel.

, On the upper side of the vapourizi'ng tubes 2 are distance-pieces .7 which retain inposition a flame ring 8. (Figs. .4 to 7.) In Fig. 4c, fins. 9- are provided on the flame ring 8 and'slots 10 with which the distance-pieces 7 register. In Fig. '6; the flame-ring'has a dish-shaped cross-section. and has slots 10 and outlets holes 11. The flames rings shown in Figures 4: to 7 are particularly useful for supporting utensils when the burners are arranged vertically,'and it has been found in practice that the burner will operate efficiently at any angle.

In the modification of the top of the burner as shown in Figure 3 the tubes 2 are arranged tangentially to a central opening 6a through the top of the burner.

In operation, the burners are connected to a suitable pressure source of fuel supply which fuel passes to the vapourizing tubes 2, from whence is passes in a vapourized condition down the gas tubes 4 to the jet orifice 5. In this orifice 5 is provided a gasified fuel jet or spray j the fuel being readily adjustable and withdrawable by the removal of the plug 55 provided at the opening 5a. The plug 55 is provided with a spherical recess 50 to form a collecting chamber for the gas and direct it upwards through the nozzle j.

The vapourized fuel is blown upwardly gathering its air for combustion from the space around the tubes 4, and the flame impinges on the vapourized cross tubes 2. As the chamber 6 and the vapourizing tubes 4: are integral, the heat generated by the ignited fuel within the chamber 6 is transmitted in part to the gas tubes 4, vapourizer tubes 2 and fuel tubes 1, and as the ignited fuel passes upwardly past the vapourizing tubes 2, which tubes 2 are integral with the tubes 4 and chamber 6, the liquid fuel within the tubes 2 and 4 is heated by the resultant conduction and is thus vapourized whilst on its way to the jet.

On top of the burner is placed a flame ring 8, the slots 10 of which register with the distance-pieces 7 provided on the upper side of the vapourizing tubes 2, above which flame ring rests the receptacle or object to which it is desired to transfer the heat given off by the burner.

When a direct flame is desired, the flame ring shown in Figs. 5 and 6 is used, the flame passing straight upwards through the ring 8 to the receptacle or object. The fins or flanges 9 are for strengthening purposes, and prevent the flame ring 8 from warping or buckling as a result of the high temperatures to which it its subjected in use.

Should a diffused flame be required the flame ring shown in Figs. 6 and 7 is used. The flames on passing upwards from the fuel spray strikes the lower side of the dishshaped portion of the flame ring, which is thus heated to a high temperature. Around the edge of the flame ring are holes 11, through which the diffused flames spurt. The effect of this type of flame ring is that the flame issues from around the edges of the ring 8, and, the dish-shaped portion of the ring 8, being at a high temperature, co-operates with the flames around the edges in transmitting diffused heat to the receptacle it supports.

It will be readily understood that owing to the simplicity of construction of this liquid fuel burner in that the tubes are free from sharp bends or are perfectly straight, and that since there are provided a plurality of openings 3 and the lower opening 5a, ready access to the interior of the burner is obtainable, which makes possible a thorough and expeditious decarbonization of the burner.

Moreover, the fact that all the parts of the liquid fuel burner according to the invention are cast integral considerably enhances, by the resultant conduction, the vapourization of the liquid fuel, whilst the elimination of brazed or welded joints due to the integral nature of the construction of the apparatus adds, as will be readily appreciated, greatly to the ability of the burner to withstand the high pressures and temperatures to which it is subjected in practice.

Round the outside top of the chamber 6 is cast integral a fin or ring 2a for strengthening and conduction purposes. Four sawcuts 12 are placed in this ring, extending from the upper edge of the chamber 6 to below the fin 2a. This allows freedom for expansion of the head of the burner, compris ing the vapourizer tubes 2, and the top of the chamber 6.

What I claim and desire to secure by Letters Patent is 1. A burner for liquid fuel under pressure, comprising a removable fuel jet, a downwardly extending series of straight inclined fuel vapour tubes conveying the vapourized fuel to the jet, a series of horizontal fuel vapourizing tubes conveying the vapour to the inclined tubes, a liquid fuel supply pipe, and a detachable screw plug screwing into the lower end of the burner, the liquid fuel supply pipe extending through the flame space above the jet directly into the horizontal vapourizing tubes, and the straight inclined vapourizing tubes meeting together at a common center below the jet into a common chamber closed by the detachable screw plug, the detachable screw plug being of sufficient size to enable the cleaning of all of the inclined tubes and also the removal of the fuel jet.

2. A burner for liquid fuel under pressure, comprising in combination a fuel et, a series of straight inclined fuel Vapour tubes extending downwardly to a common point below the jet and conveying the vapourized fuel to the jet, a series of horizontal fuel vapourizing tubes conveying vapour to the inclined tubes, a liquid fuel supply pipe conveying liquid fuel to the vapourizing tubes, and a ring shaped flame chamber arranged above the fuel jet and extending round the upper portions of the downwardly extending straight inclined tubes and the liquid fuel supply pipe.

3. A burner for liquid fuel under pressure comprising in combination a removable fuel jet, a series of straight inclined fuel vapour tubes extending downwardly to a common point below the jet and conveying the vapourized fuel to the jet, a series of horizontal fuel vapourizing tubes conveying vapour to the inclined tub-es, a liquid fuel supply pipe conveying liquid to the vapourizing tubes and a ring shaped flame chamber arranged above the fuel jet and extending round the upper portions of the downwardly extending inclined tubes and the liquid fuel supply pipe, a conducting and strengthening ring arranged at the top of the flame chamber and provided with radial saw cuts, the whole being cast as an integral unit adapted to receive the removable jet.

4. A burner for liquid fuel under pressure in accordance with claim 2 having in combination therewith a series of screw plugs having conical portions, the bores of the horizontal tubes extending diametrically through the upper portion of the burner and provided at each end with a conical seat to receive the conical portions of the screw plugs and also with tapped portions to receive the screwed portions of the conical plugs.

5. A burner for liquid fuel under pressure, comprising in combination a fuel jet, a series of straight inclined fuel vapour tubes extending downwardly to a common point below the jet and conveying the vapourized fuel to the jet, a series of horizontal fuel vapourizing tubes conveying vapour to the inclined tubes, a liquid fuel supply pipe conveying liquid fuel to the vapourizing tubes and a ring shaped flame chamber arranged above the fuel jet and extending round the upper portions of the downwardly extending straight inclined tubes and the liquid fuel supply pipe, and means for holding a detachable flame ring above the ring shaped flame chamber.

6. A burner for liquid fuel under pressure, comprising a removable fuel jet, a downwardly extending series of straight inclined fuel vapour tubes conveying the vapourized fuel to the jet, a series of horizontal fuel vapourizing tubes conveying the vapour to the inclined tubes, a liquid fuel supply pipe, a detachable screw plug screwing into the lower end of the burner, and a vapour collecting chamber, the liquid fuel supply pipe extending through the flame space above the jet directly into the horizontal vapourizing tubes, and the straight inclined vapourizing tubes meeting together below the jet in the collecting chamber, the collecting chamber being closed by the detachable screw plug,

the detachable screw plug being formed on its inner end with a spherical recess forming the base of the collecting member.

In witness whereof I affix mysignature.

LEWIS MOTLEY. 

